/* Copyright 2009 Alex Shneyderman
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.groovysips.jdiff;

/**
 * @author Alex Shneyderman
 * @since 0.3
 */
public interface Delta
{

    /**
     * @param visitor
     */
    void visit( DeltaVisitor visitor );

    public static final Delta NULL = new Delta()
    {
        public void visit( DeltaVisitor visitor )
        {
            visitor.visit( this );
        }

        public String toString()
        {
            return "Delta.NULL";
        }
    };

}